CN112955983A - Magnetic particles for forgery-preventing ink and forgery-preventing ink containing same - Google Patents
Magnetic particles for forgery-preventing ink and forgery-preventing ink containing same Download PDFInfo
- Publication number
- CN112955983A CN112955983A CN201980070572.8A CN201980070572A CN112955983A CN 112955983 A CN112955983 A CN 112955983A CN 201980070572 A CN201980070572 A CN 201980070572A CN 112955983 A CN112955983 A CN 112955983A
- Authority
- CN
- China
- Prior art keywords
- magnetic
- metal coating
- forgery
- magnetic particles
- less
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000006249 magnetic particle Substances 0.000 title claims abstract description 75
- 239000002245 particle Substances 0.000 claims abstract description 47
- 229910052751 metal Inorganic materials 0.000 claims abstract description 41
- 239000002184 metal Substances 0.000 claims abstract description 41
- 239000011247 coating layer Substances 0.000 claims abstract description 34
- 238000000576 coating method Methods 0.000 claims abstract description 34
- 239000011248 coating agent Substances 0.000 claims abstract description 31
- 230000002159 abnormal effect Effects 0.000 claims abstract description 18
- 230000003746 surface roughness Effects 0.000 claims abstract description 17
- 229910052709 silver Inorganic materials 0.000 claims description 37
- 239000004332 silver Substances 0.000 claims description 37
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 29
- 239000010410 layer Substances 0.000 claims description 16
- 238000010521 absorption reaction Methods 0.000 claims description 15
- 239000008139 complexing agent Substances 0.000 claims description 8
- 229910000828 alnico Inorganic materials 0.000 claims description 5
- MCMNRKCIXSYSNV-UHFFFAOYSA-N ZrO2 Inorganic materials O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims description 4
- PIICEJLVQHRZGT-UHFFFAOYSA-N Ethylenediamine Chemical compound NCCN PIICEJLVQHRZGT-UHFFFAOYSA-N 0.000 claims description 3
- 238000007772 electroless plating Methods 0.000 claims description 3
- 229910044991 metal oxide Inorganic materials 0.000 claims description 2
- 150000004706 metal oxides Chemical class 0.000 claims description 2
- 239000000976 ink Substances 0.000 abstract description 36
- 230000015572 biosynthetic process Effects 0.000 abstract description 14
- 230000000694 effects Effects 0.000 abstract description 4
- 239000000049 pigment Substances 0.000 description 23
- 238000000034 method Methods 0.000 description 17
- 229920005989 resin Polymers 0.000 description 17
- 239000011347 resin Substances 0.000 description 17
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 15
- -1 FeCrCo Inorganic materials 0.000 description 15
- 230000000052 comparative effect Effects 0.000 description 12
- 239000000243 solution Substances 0.000 description 11
- 230000008569 process Effects 0.000 description 9
- 239000001993 wax Substances 0.000 description 9
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 8
- SQGYOTSLMSWVJD-UHFFFAOYSA-N silver(1+) nitrate Chemical group [Ag+].[O-]N(=O)=O SQGYOTSLMSWVJD-UHFFFAOYSA-N 0.000 description 8
- 239000004094 surface-active agent Substances 0.000 description 8
- 239000002904 solvent Substances 0.000 description 7
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- 239000010419 fine particle Substances 0.000 description 6
- 239000000203 mixture Substances 0.000 description 6
- AVTYONGGKAJVTE-OLXYHTOASA-L potassium L-tartrate Chemical compound [K+].[K+].[O-]C(=O)[C@H](O)[C@@H](O)C([O-])=O AVTYONGGKAJVTE-OLXYHTOASA-L 0.000 description 6
- 239000000126 substance Substances 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 239000007771 core particle Substances 0.000 description 5
- 239000001472 potassium tartrate Substances 0.000 description 5
- 229940111695 potassium tartrate Drugs 0.000 description 5
- 235000011005 potassium tartrates Nutrition 0.000 description 5
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 4
- 238000005054 agglomeration Methods 0.000 description 4
- 230000002776 aggregation Effects 0.000 description 4
- 238000004458 analytical method Methods 0.000 description 4
- 239000012153 distilled water Substances 0.000 description 4
- 229920001971 elastomer Polymers 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000000155 melt Substances 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- 229910001961 silver nitrate Inorganic materials 0.000 description 4
- 238000003756 stirring Methods 0.000 description 4
- 239000002966 varnish Substances 0.000 description 4
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 3
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 3
- WQZGKKKJIJFFOK-GASJEMHNSA-N Glucose Natural products OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 229910021529 ammonia Inorganic materials 0.000 description 3
- 239000012298 atmosphere Substances 0.000 description 3
- 238000000889 atomisation Methods 0.000 description 3
- 239000003638 chemical reducing agent Substances 0.000 description 3
- 239000002826 coolant Substances 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 239000008103 glucose Substances 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 3
- 239000005011 phenolic resin Substances 0.000 description 3
- 229920000642 polymer Polymers 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- FPZWZCWUIYYYBU-UHFFFAOYSA-N 2-(2-ethoxyethoxy)ethyl acetate Chemical compound CCOCCOCCOC(C)=O FPZWZCWUIYYYBU-UHFFFAOYSA-N 0.000 description 2
- BGGIUGXMWNKMCP-UHFFFAOYSA-N 2-methylpropan-2-olate;zirconium(4+) Chemical compound CC(C)(C)O[Zr](OC(C)(C)C)(OC(C)(C)C)OC(C)(C)C BGGIUGXMWNKMCP-UHFFFAOYSA-N 0.000 description 2
- 101710134784 Agnoprotein Proteins 0.000 description 2
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 2
- 235000010919 Copernicia prunifera Nutrition 0.000 description 2
- 244000180278 Copernicia prunifera Species 0.000 description 2
- FEWJPZIEWOKRBE-JCYAYHJZSA-N Dextrotartaric acid Chemical compound OC(=O)[C@H](O)[C@@H](O)C(O)=O FEWJPZIEWOKRBE-JCYAYHJZSA-N 0.000 description 2
- UAUDZVJPLUQNMU-UHFFFAOYSA-N Erucasaeureamid Natural products CCCCCCCCC=CCCCCCCCCCCCC(N)=O UAUDZVJPLUQNMU-UHFFFAOYSA-N 0.000 description 2
- 239000004606 Fillers/Extenders Substances 0.000 description 2
- DPRMFUAMSRXGDE-UHFFFAOYSA-N ac1o530g Chemical compound NCCN.NCCN DPRMFUAMSRXGDE-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 239000004202 carbamide Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- JHIVVAPYMSGYDF-UHFFFAOYSA-N cyclohexanone Chemical compound O=C1CCCCC1 JHIVVAPYMSGYDF-UHFFFAOYSA-N 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229940028356 diethylene glycol monobutyl ether Drugs 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 239000003822 epoxy resin Substances 0.000 description 2
- UAUDZVJPLUQNMU-KTKRTIGZSA-N erucamide Chemical compound CCCCCCCC\C=C/CCCCCCCCCCCC(N)=O UAUDZVJPLUQNMU-KTKRTIGZSA-N 0.000 description 2
- 238000005194 fractionation Methods 0.000 description 2
- 229930182830 galactose Natural products 0.000 description 2
- 238000007646 gravure printing Methods 0.000 description 2
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 2
- 239000011261 inert gas Substances 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 230000005389 magnetism Effects 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 239000003960 organic solvent Substances 0.000 description 2
- JCGNDDUYTRNOFT-UHFFFAOYSA-N oxolane-2,4-dione Chemical compound O=C1COC(=O)C1 JCGNDDUYTRNOFT-UHFFFAOYSA-N 0.000 description 2
- IEQIEDJGQAUEQZ-UHFFFAOYSA-N phthalocyanine Chemical compound N1C(N=C2C3=CC=CC=C3C(N=C3C4=CC=CC=C4C(=N4)N3)=N2)=C(C=CC=C2)C2=C1N=C1C2=CC=CC=C2C4=N1 IEQIEDJGQAUEQZ-UHFFFAOYSA-N 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
- 229920001296 polysiloxane Polymers 0.000 description 2
- LJCNRYVRMXRIQR-OLXYHTOASA-L potassium sodium L-tartrate Chemical compound [Na+].[K+].[O-]C(=O)[C@H](O)[C@@H](O)C([O-])=O LJCNRYVRMXRIQR-OLXYHTOASA-L 0.000 description 2
- 239000002244 precipitate Substances 0.000 description 2
- 239000002243 precursor Substances 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- HELHAJAZNSDZJO-OLXYHTOASA-L sodium L-tartrate Chemical compound [Na+].[Na+].[O-]C(=O)[C@H](O)[C@@H](O)C([O-])=O HELHAJAZNSDZJO-OLXYHTOASA-L 0.000 description 2
- 235000011006 sodium potassium tartrate Nutrition 0.000 description 2
- 239000001433 sodium tartrate Substances 0.000 description 2
- 229960002167 sodium tartrate Drugs 0.000 description 2
- 235000011004 sodium tartrates Nutrition 0.000 description 2
- 125000001424 substituent group Chemical group 0.000 description 2
- 229920005992 thermoplastic resin Polymers 0.000 description 2
- 229920001187 thermosetting polymer Polymers 0.000 description 2
- XDIYNQZUNSSENW-UUBOPVPUSA-N (2R,3S,4R,5R)-2,3,4,5,6-pentahydroxyhexanal Chemical compound OC[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)C=O.OC[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)C=O XDIYNQZUNSSENW-UUBOPVPUSA-N 0.000 description 1
- DTCCVIYSGXONHU-CJHDCQNGSA-N (z)-2-(2-phenylethenyl)but-2-enedioic acid Chemical compound OC(=O)\C=C(C(O)=O)\C=CC1=CC=CC=C1 DTCCVIYSGXONHU-CJHDCQNGSA-N 0.000 description 1
- WBYWAXJHAXSJNI-VOTSOKGWSA-M .beta-Phenylacrylic acid Natural products [O-]C(=O)\C=C\C1=CC=CC=C1 WBYWAXJHAXSJNI-VOTSOKGWSA-M 0.000 description 1
- RRQYJINTUHWNHW-UHFFFAOYSA-N 1-ethoxy-2-(2-ethoxyethoxy)ethane Chemical compound CCOCCOCCOCC RRQYJINTUHWNHW-UHFFFAOYSA-N 0.000 description 1
- VXQBJTKSVGFQOL-UHFFFAOYSA-N 2-(2-butoxyethoxy)ethyl acetate Chemical compound CCCCOCCOCCOC(C)=O VXQBJTKSVGFQOL-UHFFFAOYSA-N 0.000 description 1
- DRLRGHZJOQGQEC-UHFFFAOYSA-N 2-(2-methoxypropoxy)propyl acetate Chemical compound COC(C)COC(C)COC(C)=O DRLRGHZJOQGQEC-UHFFFAOYSA-N 0.000 description 1
- PYSRRFNXTXNWCD-UHFFFAOYSA-N 3-(2-phenylethenyl)furan-2,5-dione Chemical compound O=C1OC(=O)C(C=CC=2C=CC=CC=2)=C1 PYSRRFNXTXNWCD-UHFFFAOYSA-N 0.000 description 1
- GZVHEAJQGPRDLQ-UHFFFAOYSA-N 6-phenyl-1,3,5-triazine-2,4-diamine Chemical compound NC1=NC(N)=NC(C=2C=CC=CC=2)=N1 GZVHEAJQGPRDLQ-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 1
- 229920000178 Acrylic resin Polymers 0.000 description 1
- 239000004925 Acrylic resin Substances 0.000 description 1
- DKPFZGUDAPQIHT-UHFFFAOYSA-N Butyl acetate Natural products CCCCOC(C)=O DKPFZGUDAPQIHT-UHFFFAOYSA-N 0.000 description 1
- WBYWAXJHAXSJNI-SREVYHEPSA-N Cinnamic acid Chemical compound OC(=O)\C=C/C1=CC=CC=C1 WBYWAXJHAXSJNI-SREVYHEPSA-N 0.000 description 1
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- 229930091371 Fructose Natural products 0.000 description 1
- 239000005715 Fructose Substances 0.000 description 1
- RFSUNEUAIZKAJO-ARQDHWQXSA-N Fructose Chemical compound OC[C@H]1O[C@](O)(CO)[C@@H](O)[C@@H]1O RFSUNEUAIZKAJO-ARQDHWQXSA-N 0.000 description 1
- 229920000877 Melamine resin Polymers 0.000 description 1
- 239000004640 Melamine resin Substances 0.000 description 1
- 229910052779 Neodymium Inorganic materials 0.000 description 1
- 239000000020 Nitrocellulose Substances 0.000 description 1
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 1
- CYTYCFOTNPOANT-UHFFFAOYSA-N Perchloroethylene Chemical group ClC(Cl)=C(Cl)Cl CYTYCFOTNPOANT-UHFFFAOYSA-N 0.000 description 1
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- NRCMAYZCPIVABH-UHFFFAOYSA-N Quinacridone Chemical compound N1C2=CC=CC=C2C(=O)C2=C1C=C1C(=O)C3=CC=CC=C3NC1=C2 NRCMAYZCPIVABH-UHFFFAOYSA-N 0.000 description 1
- 229920001800 Shellac Polymers 0.000 description 1
- 229920000147 Styrene maleic anhydride Polymers 0.000 description 1
- FEWJPZIEWOKRBE-UHFFFAOYSA-N Tartaric acid Natural products [H+].[H+].[O-]C(=O)C(O)C(O)C([O-])=O FEWJPZIEWOKRBE-UHFFFAOYSA-N 0.000 description 1
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- 229920001807 Urea-formaldehyde Polymers 0.000 description 1
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 1
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 1
- 150000008065 acid anhydrides Chemical class 0.000 description 1
- 125000003647 acryloyl group Chemical group O=C([*])C([H])=C([H])[H] 0.000 description 1
- 125000003172 aldehyde group Chemical group 0.000 description 1
- 150000001338 aliphatic hydrocarbons Chemical class 0.000 description 1
- 229920000180 alkyd Polymers 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 150000001408 amides Chemical class 0.000 description 1
- 125000003277 amino group Chemical group 0.000 description 1
- 229920003180 amino resin Polymers 0.000 description 1
- 235000011114 ammonium hydroxide Nutrition 0.000 description 1
- 150000003863 ammonium salts Chemical group 0.000 description 1
- PGEHNUUBUQTUJB-UHFFFAOYSA-N anthanthrone Chemical compound C1=CC=C2C(=O)C3=CC=C4C=CC=C5C(=O)C6=CC=C1C2=C6C3=C54 PGEHNUUBUQTUJB-UHFFFAOYSA-N 0.000 description 1
- PYKYMHQGRFAEBM-UHFFFAOYSA-N anthraquinone Natural products CCC(=O)c1c(O)c2C(=O)C3C(C=CC=C3O)C(=O)c2cc1CC(=O)OC PYKYMHQGRFAEBM-UHFFFAOYSA-N 0.000 description 1
- 150000004056 anthraquinones Chemical class 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 239000012300 argon atmosphere Substances 0.000 description 1
- WQZGKKKJIJFFOK-VFUOTHLCSA-N beta-D-glucose Chemical compound OC[C@H]1O[C@@H](O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-VFUOTHLCSA-N 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
- 239000005018 casein Substances 0.000 description 1
- BECPQYXYKAMYBN-UHFFFAOYSA-N casein, tech. Chemical compound NCCCCC(C(O)=O)N=C(O)C(CC(O)=O)N=C(O)C(CCC(O)=N)N=C(O)C(CC(C)C)N=C(O)C(CCC(O)=O)N=C(O)C(CC(O)=O)N=C(O)C(CCC(O)=O)N=C(O)C(C(C)O)N=C(O)C(CCC(O)=N)N=C(O)C(CCC(O)=N)N=C(O)C(CCC(O)=N)N=C(O)C(CCC(O)=O)N=C(O)C(CCC(O)=O)N=C(O)C(COP(O)(O)=O)N=C(O)C(CCC(O)=N)N=C(O)C(N)CC1=CC=CC=C1 BECPQYXYKAMYBN-UHFFFAOYSA-N 0.000 description 1
- 235000021240 caseins Nutrition 0.000 description 1
- 229920006217 cellulose acetate butyrate Polymers 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 229930016911 cinnamic acid Natural products 0.000 description 1
- 235000013985 cinnamic acid Nutrition 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 230000000875 corresponding effect Effects 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 229910000777 cunife Inorganic materials 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 229940019778 diethylene glycol diethyl ether Drugs 0.000 description 1
- PPSZHCXTGRHULJ-UHFFFAOYSA-N dioxazine Chemical compound O1ON=CC=C1 PPSZHCXTGRHULJ-UHFFFAOYSA-N 0.000 description 1
- 125000003700 epoxy group Chemical group 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- FUZZWVXGSFPDMH-UHFFFAOYSA-N hexanoic acid Chemical compound CCCCCC(O)=O FUZZWVXGSFPDMH-UHFFFAOYSA-N 0.000 description 1
- 125000002768 hydroxyalkyl group Chemical group 0.000 description 1
- 235000019239 indanthrene blue RS Nutrition 0.000 description 1
- UHOKSCJSTAHBSO-UHFFFAOYSA-N indanthrone blue Chemical compound C1=CC=C2C(=O)C3=CC=C4NC5=C6C(=O)C7=CC=CC=C7C(=O)C6=CC=C5NC4=C3C(=O)C2=C1 UHOKSCJSTAHBSO-UHFFFAOYSA-N 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- GJRQTCIYDGXPES-UHFFFAOYSA-N iso-butyl acetate Natural products CC(C)COC(C)=O GJRQTCIYDGXPES-UHFFFAOYSA-N 0.000 description 1
- FGKJLKRYENPLQH-UHFFFAOYSA-M isocaproate Chemical compound CC(C)CCC([O-])=O FGKJLKRYENPLQH-UHFFFAOYSA-M 0.000 description 1
- IQPQWNKOIGAROB-UHFFFAOYSA-N isocyanate group Chemical group [N-]=C=O IQPQWNKOIGAROB-UHFFFAOYSA-N 0.000 description 1
- PXZQEOJJUGGUIB-UHFFFAOYSA-N isoindolin-1-one Chemical compound C1=CC=C2C(=O)NCC2=C1 PXZQEOJJUGGUIB-UHFFFAOYSA-N 0.000 description 1
- GWVMLCQWXVFZCN-UHFFFAOYSA-N isoindoline Chemical compound C1=CC=C2CNCC2=C1 GWVMLCQWXVFZCN-UHFFFAOYSA-N 0.000 description 1
- OQAGVSWESNCJJT-UHFFFAOYSA-N isovaleric acid methyl ester Natural products COC(=O)CC(C)C OQAGVSWESNCJJT-UHFFFAOYSA-N 0.000 description 1
- 150000002689 maleic acids Chemical class 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 229910001092 metal group alloy Inorganic materials 0.000 description 1
- 239000000113 methacrylic resin Substances 0.000 description 1
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 description 1
- WBYWAXJHAXSJNI-UHFFFAOYSA-N methyl p-hydroxycinnamate Natural products OC(=O)C=CC1=CC=CC=C1 WBYWAXJHAXSJNI-UHFFFAOYSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 150000002772 monosaccharides Chemical class 0.000 description 1
- OBJNZHVOCNPSCS-UHFFFAOYSA-N naphtho[2,3-f]quinazoline Chemical compound C1=NC=C2C3=CC4=CC=CC=C4C=C3C=CC2=N1 OBJNZHVOCNPSCS-UHFFFAOYSA-N 0.000 description 1
- 229910052758 niobium Inorganic materials 0.000 description 1
- 229920001220 nitrocellulos Polymers 0.000 description 1
- 230000001151 other effect Effects 0.000 description 1
- 239000003002 pH adjusting agent Substances 0.000 description 1
- 239000012188 paraffin wax Substances 0.000 description 1
- 238000003921 particle size analysis Methods 0.000 description 1
- DGBWPZSGHAXYGK-UHFFFAOYSA-N perinone Chemical compound C12=NC3=CC=CC=C3N2C(=O)C2=CC=C3C4=C2C1=CC=C4C(=O)N1C2=CC=CC=C2N=C13 DGBWPZSGHAXYGK-UHFFFAOYSA-N 0.000 description 1
- 125000002080 perylenyl group Chemical group C1(=CC=C2C=CC=C3C4=CC=CC5=CC=CC(C1=C23)=C45)* 0.000 description 1
- CSHWQDPOILHKBI-UHFFFAOYSA-N peryrene Natural products C1=CC(C2=CC=CC=3C2=C2C=CC=3)=C3C2=CC=CC3=C1 CSHWQDPOILHKBI-UHFFFAOYSA-N 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 150000002989 phenols Chemical class 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920002037 poly(vinyl butyral) polymer Polymers 0.000 description 1
- 229920006122 polyamide resin Polymers 0.000 description 1
- 229920001225 polyester resin Polymers 0.000 description 1
- 239000004645 polyester resin Substances 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229940074439 potassium sodium tartrate Drugs 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- HXHCOXPZCUFAJI-UHFFFAOYSA-N prop-2-enoic acid;styrene Chemical compound OC(=O)C=C.C=CC1=CC=CC=C1 HXHCOXPZCUFAJI-UHFFFAOYSA-N 0.000 description 1
- LLHKCFNBLRBOGN-UHFFFAOYSA-N propylene glycol methyl ether acetate Chemical compound COCC(C)OC(C)=O LLHKCFNBLRBOGN-UHFFFAOYSA-N 0.000 description 1
- LLBIOIRWAYBCKK-UHFFFAOYSA-N pyranthrene-8,16-dione Chemical compound C12=CC=CC=C2C(=O)C2=CC=C3C=C4C5=CC=CC=C5C(=O)C5=C4C4=C3C2=C1C=C4C=C5 LLBIOIRWAYBCKK-UHFFFAOYSA-N 0.000 description 1
- FYNROBRQIVCIQF-UHFFFAOYSA-N pyrrolo[3,2-b]pyrrole-5,6-dione Chemical compound C1=CN=C2C(=O)C(=O)N=C21 FYNROBRQIVCIQF-UHFFFAOYSA-N 0.000 description 1
- 238000002310 reflectometry Methods 0.000 description 1
- 238000001878 scanning electron micrograph Methods 0.000 description 1
- 239000004208 shellac Substances 0.000 description 1
- ZLGIYFNHBLSMPS-ATJNOEHPSA-N shellac Chemical compound OCCCCCC(O)C(O)CCCCCCCC(O)=O.C1C23[C@H](C(O)=O)CCC2[C@](C)(CO)[C@@H]1C(C(O)=O)=C[C@@H]3O ZLGIYFNHBLSMPS-ATJNOEHPSA-N 0.000 description 1
- 229940113147 shellac Drugs 0.000 description 1
- 235000013874 shellac Nutrition 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 229920002050 silicone resin Polymers 0.000 description 1
- 239000001476 sodium potassium tartrate Substances 0.000 description 1
- 125000005504 styryl group Chemical group 0.000 description 1
- 239000011975 tartaric acid Substances 0.000 description 1
- 235000002906 tartaric acid Nutrition 0.000 description 1
- 229940095064 tartrate Drugs 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 229920002803 thermoplastic polyurethane Polymers 0.000 description 1
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N titanium dioxide Inorganic materials O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 1
- 239000011882 ultra-fine particle Substances 0.000 description 1
- 229920006337 unsaturated polyester resin Polymers 0.000 description 1
- 229940117958 vinyl acetate Drugs 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
- B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
- B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
- B42D25/30—Identification or security features, e.g. for preventing forgery
- B42D25/36—Identification or security features, e.g. for preventing forgery comprising special materials
- B42D25/378—Special inks
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/17—Metallic particles coated with metal
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/16—Making metallic powder or suspensions thereof using chemical processes
- B22F9/18—Making metallic powder or suspensions thereof using chemical processes with reduction of metal compounds
- B22F9/24—Making metallic powder or suspensions thereof using chemical processes with reduction of metal compounds starting from liquid metal compounds, e.g. solutions
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
- B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
- B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
- B42D25/30—Identification or security features, e.g. for preventing forgery
- B42D25/36—Identification or security features, e.g. for preventing forgery comprising special materials
- B42D25/369—Magnetised or magnetisable materials
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D11/00—Inks
- C09D11/02—Printing inks
- C09D11/03—Printing inks characterised by features other than the chemical nature of the binder
- C09D11/037—Printing inks characterised by features other than the chemical nature of the binder characterised by the pigment
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D11/00—Inks
- C09D11/52—Electrically conductive inks
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/10—Ferrous alloys, e.g. steel alloys containing cobalt
- C22C38/105—Ferrous alloys, e.g. steel alloys containing cobalt containing Co and Ni
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/14—Ferrous alloys, e.g. steel alloys containing titanium or zirconium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/16—Ferrous alloys, e.g. steel alloys containing copper
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
- H01B1/20—Conductive material dispersed in non-conductive organic material
- H01B1/22—Conductive material dispersed in non-conductive organic material the conductive material comprising metals or alloys
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/032—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials
- H01F1/04—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys
- H01F1/047—Alloys characterised by their composition
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/032—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials
- H01F1/04—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys
- H01F1/06—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys in the form of particles, e.g. powder
- H01F1/061—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys in the form of particles, e.g. powder with a protective layer
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/24—Magnetic cores
- H01F27/255—Magnetic cores made from particles
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F3/00—Cores, Yokes, or armatures
- H01F3/08—Cores, Yokes, or armatures made from powder
Abstract
Disclosed are magnetic particles and security ink containing the same, which are characterized by comprising a magnetic core and a metal coating formed on the outside of the magnetic core, wherein the surface roughness (Ra) is 0.15 [ mu ] m or less. The magnetic particles according to the present invention do not undergo an abnormal increase in particle size after the formation of the metal coating layer, and thus have an effect suitable for use in security inks.
Description
Technical Field
The present application claims benefits based on the priority of korean patent application No. 2019-0091611, filed on 29.7.2019, the entire contents of which are disclosed in the literature are incorporated herein as a part of the present specification.
The present invention relates to magnetic particles for forgery-preventing ink and forgery-preventing ink containing the same.
Background
As a security factor for preventing forgery and authentication of genuine products of counterfeit documents such as bank notes, the use of magnetic substances is increasing. When a pattern is printed on a forgery-preventing document using forgery-preventing ink prepared by mixing magnetic substances into ink, whether or not the forgery-preventing document is falsified can be confirmed using a detection device capable of detecting the magnetic substances.
Generally, the magnetic substance is contained in the forgery-preventing ink in the form of fine particles in a micron unit. In particular, in order to form a forgery-preventing ink pattern by the gravure printing method, it is necessary to control the size of the magnetic particles contained in the forgery-preventing ink to a certain value or less. Therefore, in the process of manufacturing the magnetic particles, a grading process is performed to screen out particles with a predetermined size or less for use in the manufacture of the security ink.
On the other hand, since magnetic particles generally have a dark color, a technique of forming a metal coating layer of silver (Ag) or the like on the surface of the magnetic particles to impart a bright color is known. However, in the metal coating process, there are cases where the particle size of the magnetic particles unexpectedly increases above the intended range. This may cause problems during the printing of the security ink.
In addition, the viscosity of the forgery-preventing ink is strictly designed in order to ensure Printability (Printability). However, the magnetic particles may significantly increase the viscosity of the forgery-preventing ink, thereby deteriorating the printability of the forgery-preventing ink.
Disclosure of Invention
The present invention has been made to solve the above-described problems of the prior art, and an object of the present invention is to provide magnetic particles that maintain a uniform particle size even after a metal coating layer is formed.
Another object of the present invention is to provide magnetic particles that do not significantly increase the viscosity of a security ink, and a security ink including the same.
The objects of the present invention are not limited to the foregoing, and other objects and advantages of the present invention, which have not been mentioned yet, can be understood by the following description.
A magnetic particle according to an embodiment of the present invention for achieving the object includes a magnetic core and a metal coating layer formed outside the magnetic core, and is characterized in that a surface roughness (Ra) is 0.15 μm or less. An intermediate layer of metal oxide may be formed between the magnetic core and the metal coating layer.
The magnetic particles may have a reflectance of 900nm light of 60% or more and a particle size (D)90) Has a particle size of 15 μm or less and an oil absorption of 20 or less.
The magnetic core may be AlNiCo particles and the intermediate layer may be ZrO2The metal coating is a silver (Ag) coating. When the metal coating is a silver coating, the metal coating may be formed by electroless plating using ethylenediamine as a complexing agent.
In addition, a magnetic particle according to an embodiment of the present invention includes a magnetic core and a metal coating layer formed outside the magnetic core, and is characterized in that an abnormal protrusion forming area of a surface of the metal coating layer is 2% or less with respect to an entire area of the magnetic particle.
An embodiment of the forgery-preventing ink according to the present invention is characterized by containing any of the magnetic particles described above. The viscosity of the forgery-preventing ink may be 12Pa · sec or less.
According to the present invention, the surface roughness (Ra) after the metal coating layer is formed is 0.15 μm or less, preferably 0.14 μm or less, and more preferably 0.13 μm or less, so that there is an effect that magnetic particles and forgery-preventing ink which maintain a uniform particle size even after the metal coating layer is formed and do not greatly increase the viscosity of forgery-preventing ink can be provided.
However, the effects of the present invention are not limited to the above-mentioned, and those having ordinary knowledge in the art to which the present invention pertains can clearly understand other effects not mentioned through the following description.
Drawings
Fig. 1 is a conceptual diagram of a magnetic particle according to an embodiment of the present invention.
Fig. 2 is a flowchart of a method of forming a silver (Ag) coating layer according to an embodiment of the present invention.
Fig. 3 is a comparison result of SEM photographs of the surface based on whether the particle size increased after forming the silver coating layer.
Fig. 4 is a result of comparing SEM photographs of samples of examples of the present invention and comparative examples.
Detailed Description
Hereinafter, preferred embodiments of the present invention will be described in detail, but the present invention is not limited or restricted by the embodiments. In the description of the present invention, when it is judged that the detailed description of the related known art may obscure the gist of the present invention, the detailed description thereof is omitted. In addition, when not otherwise defined, terms used in the present specification should be construed as generally understood by those having ordinary knowledge in the art.
The present invention relates to magnetic particles having a structure in which a metal coating layer is formed on a magnetic core, and forgery prevention ink containing the same. An intermediate layer for improving durability and chemical resistance of the magnetic particles may be formed between the magnetic core and the metal coating layer.
The present inventors have found that, in the production process of magnetic particles having such a structure, even if the particle size of the magnetic core is strictly adjusted to a predetermined value or less, a phenomenon occurs in which the particle size greatly increases from the particle size at which the coating thickness exceeds a desired range after the metal coating is formed, and in the process of finding the cause thereof, it is known that the increased surface roughness caused by the formation of uneven metal coating, specifically, the local formation of abnormal projections, is associated with the particle size increase phenomenon, and thus have completed the present invention.
Fig. 1 is a conceptual diagram of a magnetic particle according to an embodiment of the present invention. Referring to fig. 1, a magnetic particle 1 according to an embodiment of the present invention includes a magnetic core 10 and a metal coating layer 30 formed outside the magnetic core 10. An intermediate layer 20 may be formed between the magnetic core 10 and the metal coating layer 30.
The magnetic core 10 may be a metal or a metal alloy having magnetism as a configuration for providing magnetism to the magnetic particles 1. The magnetic core 10 may be formed of a material including one or more selected from the group consisting of Fe, Cu, Al, Ni, Co, Nb, Nd, Si, B, Cr, and Sm. It may be preferably AlNiCo, FeCrCo, or CuNiFe. The magnetic core 10 may be substantially spherical, and the particle size may be adjusted to 15 μm or less so as to be suitable for forgery-preventing ink. Wherein, the particle size may mean a particle size D corresponding to 90% of the cumulative distribution of particle diameters90。
The magnetic core 10 can be manufactured by the following method. First, a raw material in the form of powder or ingot is melted in an inert gas atmosphere to produce a melt, and then atomized (Atomization) to produce fine particles. Specifically, the melt may be injected into a vacuum atomization sealer (vacuum atomization) and the cooling medium may be atomized at a predetermined pressure through a nozzle to produce fine particles. As the cooling medium, water which can produce ultrafine particles at an excellent yield by rapid cooling can be used. In this case, the water may contain an antioxidant such as urea. The produced fine particles may be subjected to heat treatment under an inert gas atmosphere to increase the coercive force. After the heat treatment, particles having a predetermined size or less can be screened out through a classification process. Fractionation may use gas stream fractionation. Can be subjected to a classification process to obtain the particle size (D)90) A magnetic core 10 having a diameter of 15 μm or less.
An intermediate layer 20 may be formed between the magnetic core 10 and the metal coating layer 30, thereby improving durability and chemical resistance of the magnetic particle 1. The intermediate layer 20 may make the metal coating 30 uniformAnd (4) forming. The intermediate layer 20 may be made of TiO2Or ZrO2And the like. The intermediate layer 20 may be formed to a thickness of about 5nm to 15 nm. The method of forming the intermediate layer 20 is not particularly limited and may be formed by a sol-gel coating method.
The metal coating 30 can reflect light to impart a bright color to the magnetic particles 1. The metal coating 30 may be a silver (Ag) coating having excellent reflectivity. The metal coating layer 30 may be formed to a thickness of about 50nm to 100 nm. When the metal coating layer 30 is a silver (Ag) coating layer, in order to form a uniform coating layer, the silver (Ag) content may be adjusted so as to reach a range of 10 wt% to 20 wt% with respect to the weight of the magnetic core 10.
The metal coating 30 may be formed by an electroless plating method. It is assumed that the silver (Ag) coating layer can be formed in the order shown in fig. 2.
Referring to fig. 2, a silver (Ag) coating forming method according to an embodiment of the present invention may include: a step (S21) of producing a silver amine complex solution; a step (S22) of adding magnetic core particles to the manufactured silver amine complex solution; a step (S23) of charging a reducing agent solution; and a washing and drying step (S24).
First, the step of preparing the silver amine complex solution (S21) may be a step of adding a silver precursor, a pH adjuster, and a Complexing agent (Complexing agent) to a solvent, and then stirring the mixture to prepare the silver amine complex solution. Wherein the solvent is distilled water, and the silver precursor is silver nitrate (AgNO)3) The complexing agent may be ammonia (NH)3) Or ethylenediamine (Ethylene diamine). Can be prepared from ammonia (NH)4OH) or ammonium salt form into ammonia gas. For forming a uniform silver coating, ethylene diamine may be preferably used as a complexing agent. Stirring may be carried out until a brown precipitate is formed.
The step S22 is a step of adding magnetic core particles to the manufactured silver amine complex solution. The magnetic core particles may be particles having an intermediate layer formed on the surface thereof. The magnetic core may be AlNiCo particles and the intermediate layer may be ZrO2And (3) a layer. The magnetic core may be of a particle size (D)90) Adjusted to particles of 15 μm or less. After the addition, sufficient stirring may be performed to uniformly mix the magnetic core particles and the silver amine complex solutionThe step (2).
Next, a reducing agent solution is charged (S23). As the reducing agent, glucose (glucose), monosaccharide (fructose), galactose (galactose), potassium tartrate (potassium tartrate), sodium potassium tartrate (potassium sodium tartrate), sodium tartrate (sodium tartrate), stearyl tartrate (stearyl tartrate), formaldehyde, and the like can be included. Preferably, a solution in which glucose and potassium tartrate are dissolved in distilled water may be used.
Finally, the magnetic particles on which the silver coating layer is formed may be separated, washed, and dried (S24). The magnetic particles can be separated by a magnet, and can be repeatedly washed by ethanol for multiple times.
On the other hand, by the classification process, only a predetermined size or less, for example, a particle size (D) is screened out90) In the case of the magnetic core 10 having a thickness of 15 μm or less, the metal coating forming process is performed, and even then, the grain size is found to increase greatly after coating according to the metal coating process conditions. For this reason, after the silver coating layer was formed, a sample having a normal particle size distribution and a sample having an abnormally increased particle size were extracted and analyzed by a Scanning Electron Microscope (SEM), and the results thereof are shown in FIG. 3.
Referring to FIG. 3, when the granularity (D)90) In the case of a normal sample of 15 μm or less, a relatively uniform formation of one spherical magnetic particle of the silver coating was observed, in contrast to the particle size (D) when analyzed90) In the case of the sample having a particle size of more than 15 μm, a plurality of magnetic particles were observed to be agglomerated (see the lower right end of the photograph). That is, it is presumed that a phenomenon in which magnetic particles agglomerate with each other occurs during the formation of the silver coating layer, and the particle size is greatly increased due to this agglomeration phenomenon.
If such increased particle size magnetic particles are applied to a security ink, problems may be caused in forming a magnetic pattern by a gravure printing method. In addition, the increased surface area due to the agglomeration of the magnetic particles may increase the oil absorption, thereby affecting the physical properties of the forgery-preventing ink. Specifically, the viscosity of the anti-forgery ink can be greatly increased to be higher than a design value, so that the printability is damaged.
In the case of a sample in which the particle size is greatly increased by the agglomeration phenomenon of the magnetic particles, a phenomenon in which abnormal projections are locally formed, which are not normally projected, is observed, unlike the normal magnetic particle sample, in which the silver coating layer is not uniformly formed (see the arrow in fig. 3). Although the mechanism is not clearly found, it is presumed that the case where an abnormal projection is formed during the formation of the silver coating layer and the increase in the particle size of the magnetic particles are correlated with each other.
The formation of such local abnormal protrusions may cause an increase in the surface roughness of the magnetic particles. Therefore, in order to obtain magnetic particles free from local formation of abnormal projections and particle size increase, it is important to control the surface roughness of the metal coating to a predetermined value or less.
In this point of view, the magnetic particle according to the embodiment of the present invention is characterized in that the surface roughness of the metal coating layer is a predetermined value or less. Specifically, the surface roughness (Ra) may be 0.15 μm or less, preferably 0.14 μm or less, and more preferably 0.13 μm or less. The surface roughness can be measured using a Laser Scanning Confocal Microscope (CLSM).
In order to obtain bright magnetic particles, it is important to control the surface roughness of the metal coating to a predetermined value or less and to control the reflectance to a predetermined value or more. Therefore, the magnetic particles according to the embodiments of the present invention may have a reflectance of 900nm light of 60% or more.
In addition, the magnetic particle according to an embodiment of the present invention may be such that the shape area of the abnormal protrusion in the part of the metal coating layer is 2% or less with respect to the surface area of the magnetic particle. In the scanning electron micrograph, the area of a part of the center of the magnetic particle is extracted, and the area of the abnormal protrusion can be calculated. For example, a square region having one side of about 50% of the diameter of the magnetic particle may be extracted as the target region, and the area ratio of the abnormal protrusion included in the target region to the entire area of the target region may be calculated. The area of the target region and the area of the abnormal protrusion included in the target region may be automatically calculated by an image processing algorithm, but is not limited thereto.
The magnetic particles according to embodiments of the present invention may have an oil absorption of 20 or less, preferably 15 or less. Here, the oil absorption indicates the amount (g) of oil absorbed per 100g of the magnetic particle sample. The magnetic particles are kept low in oil absorption, so that the phenomenon that the viscosity of the security ink containing the magnetic particles is increased by the magnetic particles can be minimized.
The present invention discloses, as an embodiment, a security ink comprising magnetic particles. The security ink according to the present invention may comprise 5 to 15 wt% of the above-described magnetic particles, including 20 to 40 wt% of a varnish, 30 to 50 wt% of a pigment, 5 to 10 wt% of a surfactant, 1 to 10 wt% of a wax, and 2 to 10 wt% of a solvent.
For example, the varnish may be a thermoplastic resin, a thermosetting resin, or a photocurable resin, and may be dissolved in an organic solvent. Examples of the thermoplastic resin include petroleum resin, casein, shellac, rosin-modified maleic acid resin, rosin-modified phenol resin, nitrocellulose, cellulose acetate butyrate, cyclized rubber, chlorinated rubber, oxidized rubber, hydrochlorinated rubber, phenol resin, alkyd resin, polyester resin, unsaturated polyester resin, amino resin, epoxy resin, vinyl chloride resin, perchloroethylene resin, chloroacetic vinyl resin, vinylacetate resin, acrylic resin, methacrylic resin, urethane resin, silicone resin, fluorine resin, drying oil, synthetic drying oil, styrene-maleic acid resin, styrene-acrylic acid resin, polyamide resin, and butyral resin. Examples of the thermosetting resin include epoxy resin, phenol resin, benzoguanamine resin, melamine resin, and urea resin. As the photocurable resin (photosensitive resin), a resin in which a (meth) acrylic compound or cinnamic acid having a reactive substituent such as an isocyanate group, an aldehyde group, or an epoxy group is reacted with a linear polymer having a reactive substituent such as a hydroxyl group, a carboxyl group, or an amino group to introduce a photocrosslinkable group such as a (meth) acryloyl group or a styryl group into the linear polymer can be used. Further, a resin obtained by half-esterifying a linear polymer containing an acid anhydride such as a styrene-maleic anhydride copolymer or an α -olefin-maleic anhydride copolymer with a (meth) acrylic compound having a hydroxyl group such as hydroxyalkyl (meth) acrylate may be used.
The pigment is not particularly limited, and for example, a soluble azo pigment, an insoluble azo pigment, a phthalocyanine pigment, a halogenated phthalocyanine pigment, a quinacridone pigment, an isoindolinone pigment, an isoindoline pigment, a perylene pigment, a perinone pigment, a dioxazine pigment, an anthraquinone pigment, a dianthraquinone-based pigment, an anthrapyrimidine pigment, an anthanthrone pigment, an indanthrone pigment, a xanthanthrone pigment, a pyranthrone pigment, or a diketopyrrolopyrrole pigment, or the like can be used.
The surfactant may be any one or more selected from the group consisting of fluorinated surfactants, polymerizable fluorinated surfactants, silicone surfactants, polymerizable silicone surfactants, polyoxyethylene surfactants, derivatives thereof, and the like, and the kind thereof is not particularly limited.
The wax may be a powder type having an effect of reducing the stickiness (tack) of the resin, and may include one or more selected from polyethylene wax, amide wax, erucamide (erucamide) wax, polypropylene wax, paraffin wax, teflon, carnauba (carnauba) wax, and the like, as an example, but is not limited thereto.
The solvent is not particularly limited as long as it is a solvent capable of uniformly mixing a wax, a pigment, a varnish, and the like as a general organic solvent. The solvent that can be used may be any one or two or more selected from ethyl acetate, butyl acetate, isobutyl acetate, toluene, xylene, acetone, hexane, methyl ethyl ketone, cyclohexanone, propylene glycol monomethyl ether acetate, diethylene glycol monoethyl ether acetate, diethylene glycol diethyl ether, diethylene glycol monobutyl ether, dipropylene glycol monomethyl ether acetate, diethylene glycol monoethyl ether acetate, diethylene glycol monobutyl ether acetate, and the like.
The forgery-preventing ink according to the embodiment of the present invention may have a viscosity of 12Pa · sec or less, and may preferably have a viscosity in a range of 8Pa · sec to 12Pa · sec.
The present invention will be described in more detail below based on specific examples.
1. Manufacture of magnetic cores
In order to produce an AlNiCo magnetic core, a raw material powder is put into a furnace and then heated to form a melt according to a design composition. The alloy was designed to have a composition of 6 wt% Al, 15 wt% Ni, 22 wt% Co, 4 wt% Ti, 3 wt% Cu, and 50 wt% Fe, and heated at 1600 ℃ in a furnace in an inert atmosphere. The raw material powder has a purity of 99.9% or higher. The melt was injected into a vacuum atomizing sealer, and atomized at 600bar using 25% urea aqueous solution as a cooling medium to form fine particles.
The produced fine particles were heat-treated at 750 ℃ for 1 hour under an argon atmosphere. The particles obtained after the heat treatment were spun at a speed of 7500rpm and 2.8m3And (3) carrying out air flow classification in a circulation mode under the condition of air injection amount per minute. By air classification, D is obtained90Magnetic core particles having a particle diameter of 15 μm or less.
2. Formation of intermediate layer
After 10g of a magnetic core and 10ml of distilled water were put into ethanol, the mixture was dispersed by ultrasonic irradiation. Wherein a solution in which 10ml of Zirconium tert-butoxide (Zirconium-tert-butoxide) and 170ml of ethanol were mixed was slowly charged. After stirring at 85 ℃ for 3 hours at a rotational speed of 300rpm, ZrO formed was separated by a magnet2The coated particles were washed 2 times with ethanol and then dried.
3. Formation of a Metal coating
Into 1200ml of distilled water was charged 21g of silver nitrate (AgNO)3) And 4g of sodium hydroxide (NaOH), 34ml of a complexing agent was added, and the mixture was stirred until a brown precipitate became a transparent silver amine complex solution. The complexing agent uses ammonia (NH)3) Or ethylenediamine (Ethylene diamine). Ammonia gas as ammonia water (NH)4OH) form is added.
60g of ZrO formed by adding to the silver amine complex solution2The coated particles were then stirred at 300rpm for 30 minutes. 20g of Glucose (Glucose) and potassium tartrate (po) were added to 400ml of distilled watertasssium tartrate) was stirred at 300rpm for 1 hour to form a silver coating. After separating the obtained magnetic particles with a magnet, the magnetic particles were washed with ethanol 2 times and dried.
The reaction temperature at the time of forming the silver coating was maintained at about 3 to 5 ℃, and for comparison, a sample in which the reaction temperature was changed to 25 ℃ was also obtained. The potassium tartrate is present in a range of about 5% to about 10% by weight relative to the silver nitrate.
The process conditions for forming the silver coating layers of the examples and comparative examples are shown in table 1.
[ Table 1]
And tartaric acid g/silver nitrate g x 100
4. Preparation of anti-counterfeiting ink
A forgery-preventing ink containing 10 wt% of the magnetic particles prepared was produced. In addition to the magnetic particles, 32 wt% of varnish, 5 wt% of filler, 34 wt% of extender pigment, 8 wt% of mixed wax, 2 wt% of aliphatic hydrocarbon, 2 wt% of solvent (diethylene glycol monobutyl ether), 2 wt% of surfactant were contained.
5. Analysis results
The samples of the magnetic particles of the examples and comparative examples were analyzed for surface roughness, reflectance, particle size, and oil absorption, and the viscosities of the forgery-preventing inks prepared by including the magnetic particles were compared. The surface roughness (Ra) was measured by a laser scanning confocal microscope (CLSM), and the reflectance was measured with reference to a 900nm light. The particle size was measured using a particle size analyzer (Beckman, Coulter Multisizer3), and the Oil absorption (Oil absorption value) was measured according to the test method for measuring the Oil absorption of a pigment or extender defined as part of the korean industrial standard KS M ISO 787.
The surface of the magnetic particle sample was observed with a scanning electron microscope (FEI company, Magellan 400). After selecting the central region of the surface image of each sample as the target region, the abnormal bulge in the target region was observed, and the abnormal bulge formation area ratio was calculated.
As for the viscosity of the forgery-preventing ink, a rotary viscometer (Haake Rotovisco) was used, and a sample holding pitch was 0.1mm, a temperature was 40 ℃, and a shear rate was 1000S-1Under the conditions of (1), the measurement was carried out for 30 seconds.
The results of analyzing the characteristics of the samples of examples and comparative examples are shown in table 2, and fig. 4 shows the results of observing the surfaces of the magnetic particles of examples and comparative examples 1, 2, and 3 with a scanning electron microscope.
[ Table 2]
From the results of table 2, it was confirmed that in the example sample, the surface roughness (Ra) was relatively low at 0.125 μm, and the reflectance was as high as 64.6%, thereby forming a uniform silver coating layer. In addition, in the observation result of the scanning electron microscope of fig. 4, the abnormal convex portion was not present. As a result of the particle size analysis, it was confirmed that the particle size (D) is90) In the process of forming the silver coating layer of 13.2 d, the particle size was not increased, and thus low oil absorption property and viscosity property were obtained.
The sample of comparative example 1 showed a surface roughness (Ra) of 0.144 μm and was relatively low, and also showed no increase in particle size, whereas the reflectance was 51.1% and was low. As can be confirmed by the scanning electron microscope observation result of fig. 4, this is because the silver coating does not cover the entire area of the magnetic particles and there is a region which is not coated locally. That is, even if the surface roughness (Ra) is 0.15 μm or less as in the sample of comparative example 1 and the oil absorption or viscosity is kept low, if the reflectance is 60% or less, it is not suitable as the magnetic particles in the forgery prevention ink suitable for bright colors.
The analysis results of the samples of comparative examples 2, 3 and 4 showed that the reflectance was 60% or more and the reflectance was within the normal range, but the surface roughness (Ra) was 0.15 μm or more in all and the particle size (D) was90) Also in the formation of silver coatingAnd (4) increasing. From the analysis results of table 2, it was confirmed that it resulted in an increase in oil absorption and an increase in viscosity. From the observation results (fig. 4) of the comparative examples 2 and 3, it was confirmed that the samples of comparative examples 2 and 3 had abnormal projections. The abnormal protrusion formation area ratios of the samples of comparative examples 2 and 3 were 2.6% and 4.8%, respectively, and all of them were 2% or more, and the occurrence of the agglomeration phenomenon with the surrounding magnetic particles was observed in the scanning electron microscope analysis.
The formation of such an abnormal silver coating and the resulting increase in particle size resulted in an increase in oil absorption and viscosity, and the oil absorption of all of the samples of comparative examples 2 to 4 was 20 or more, and the viscosity exceeded 12Pa · sec.
While the present invention has been described with reference to the limited embodiments and the accompanying drawings, it is to be understood that the present invention is not limited thereto, and various changes and modifications may be made by those skilled in the art without departing from the scope of the present invention. In addition, the technical ideas described in the embodiments may be implemented not only independently but also in combination with each other. Therefore, the scope of the present invention should be determined by the description in the claims and the equivalents thereof.
Claims (10)
1. A magnetic particle comprising a magnetic core and a metal coating layer formed on the outside of the magnetic core,
the surface roughness (Ra) is 0.15 [ mu ] m or less.
2. The magnetic particle according to claim 1,
an intermediate layer of metal oxide is formed between the magnetic core and the metal coating layer.
3. The magnetic particle according to claim 2,
the reflectance for 900nm light is 60% or more.
4. The magnetic particle according to claim 2,
particle size (D)90) Is 15 mum is less than or equal to m.
5. The magnetic particle according to claim 2,
the oil absorption is 20 or less.
6. The magnetic particle according to claim 2,
the magnetic core is AlNiCo particles, and the middle layer is ZrO2A layer, the metal coating being a silver coating.
7. The magnetic particle according to claim 1,
the metal coating is a silver coating formed by electroless plating using ethylenediamine as a complexing agent.
8. A magnetic particle comprising a magnetic core and a metal coating layer formed on the outside of the magnetic core,
the abnormal protrusion forming area of the metal coating surface is 2% or less of the entire area of the magnetic particles.
9. A security ink comprising the magnetic particles of any one of claims 1 to 8.
10. A security ink as claimed in claim 9,
the viscosity is 12Pa sec or less.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2019-0091611 | 2019-07-29 | ||
| KR1020190091611A KR102218729B1 (en) | 2019-07-29 | 2019-07-29 | Magnetic particles for security ink and security ink including the same |
| PCT/KR2019/009707 WO2021020635A1 (en) | 2019-07-29 | 2019-08-05 | Magnetic particle for security ink and security ink comprising same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112955983A true CN112955983A (en) | 2021-06-11 |
Family
ID=74230369
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201980070572.8A Pending CN112955983A (en) | 2019-07-29 | 2019-08-05 | Magnetic particles for forgery-preventing ink and forgery-preventing ink containing same |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US20220153055A1 (en) |
| EP (1) | EP3886124A4 (en) |
| JP (1) | JP7312254B2 (en) |
| KR (1) | KR102218729B1 (en) |
| CN (1) | CN112955983A (en) |
| WO (1) | WO2021020635A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102601962B1 (en) * | 2022-03-15 | 2023-11-14 | 한국기계연구원 | Materials for 3d printing and 3d printer using the same |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001068322A (en) * | 1999-06-24 | 2001-03-16 | Toda Kogyo Corp | Compound magnetic particle powder for magnetic recording medium, its manufacturing method and recording medium |
| JP2009086340A (en) * | 2007-09-28 | 2009-04-23 | Dowa Electronics Materials Co Ltd | Carrier core material for electrophotographic developer and manufacturing method therefor, carrier for electrophotographic developer, and electrophotographic developer |
| US20150235745A1 (en) * | 2011-12-22 | 2015-08-20 | Korea Minting, Security Printing Id Card Operating Corp. | Magnetic particle having a highly reflective protective film, and method for manufacturing same |
| KR101718505B1 (en) * | 2015-12-29 | 2017-03-22 | 한국조폐공사 | Method of manufacturing of magnetic particle for security ink and security ink using the same |
| KR101869484B1 (en) * | 2017-12-29 | 2018-06-20 | 한국조폐공사 | Light magnetic particle improved with durability and chemical resistance |
| KR101912099B1 (en) * | 2017-11-17 | 2018-10-26 | 한국조폐공사 | AlNiCo Based Magnetic Particle For Security Ink and security ink using the same |
| KR101912100B1 (en) * | 2017-11-17 | 2018-10-26 | 한국조폐공사 | Producing Method of AlNiCo Based Magnetic Particle For Security Ink |
| CN109401442A (en) * | 2018-11-09 | 2019-03-01 | 广东彩乐智能包装科技有限公司 | A kind of silver-plated electrically conductive ink of UV curing nano and preparation method thereof |
| CN114266334A (en) * | 2021-12-21 | 2022-04-01 | 武汉华工图像技术开发有限公司 | Holographic anti-counterfeiting PC film, PC card and preparation method |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002353016A (en) * | 2001-05-22 | 2002-12-06 | Fuji Photo Film Co Ltd | Ferromagnetic metal powder and magnetic recording medium containing the ferromagnetic metal powder |
| US20050089683A1 (en) * | 2003-09-12 | 2005-04-28 | Fuji Photo Film Co., Ltd. | Magnetic particles and method of producing the same and magnetic recording medium |
| JP4431085B2 (en) * | 2004-06-24 | 2010-03-10 | シャープ株式会社 | Conductive ink composition, reflecting member, circuit board, electronic device |
| AU2008258232B2 (en) * | 2007-06-05 | 2013-12-05 | Bank Of Canada | Ink or toner compositions, methods of use, and products derived therefrom |
| CN102160125B (en) * | 2008-09-19 | 2013-07-03 | 株式会社日本触媒 | Electroconductive particles and anisotropic electroconductive material using the same |
| TWI478990B (en) * | 2009-04-09 | 2015-04-01 | Sicpa Holding Sa | Clear magnetic intaglio printing ink |
| KR101339080B1 (en) * | 2010-12-30 | 2013-12-10 | 한국조폐공사 | Magnetic Particle and the Fabrication Method Thereof |
| KR102125498B1 (en) * | 2013-09-16 | 2020-06-23 | 한국조폐공사 | Infrared absorptive intaglio inks |
| KR102264490B1 (en) * | 2015-12-29 | 2021-06-14 | 한국조폐공사 | Method of manufacturing magnetic particle with controlled particle size distribution and security ink using the same |
| KR20190091611A (en) | 2018-01-29 | 2019-08-07 | 김선우 | Color changeable mobile phone case |
-
2019
- 2019-07-29 KR KR1020190091611A patent/KR102218729B1/en active IP Right Grant
- 2019-08-05 JP JP2021526694A patent/JP7312254B2/en active Active
- 2019-08-05 US US17/413,551 patent/US20220153055A1/en active Pending
- 2019-08-05 WO PCT/KR2019/009707 patent/WO2021020635A1/en unknown
- 2019-08-05 CN CN201980070572.8A patent/CN112955983A/en active Pending
- 2019-08-05 EP EP19939433.9A patent/EP3886124A4/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001068322A (en) * | 1999-06-24 | 2001-03-16 | Toda Kogyo Corp | Compound magnetic particle powder for magnetic recording medium, its manufacturing method and recording medium |
| JP2009086340A (en) * | 2007-09-28 | 2009-04-23 | Dowa Electronics Materials Co Ltd | Carrier core material for electrophotographic developer and manufacturing method therefor, carrier for electrophotographic developer, and electrophotographic developer |
| US20150235745A1 (en) * | 2011-12-22 | 2015-08-20 | Korea Minting, Security Printing Id Card Operating Corp. | Magnetic particle having a highly reflective protective film, and method for manufacturing same |
| KR101718505B1 (en) * | 2015-12-29 | 2017-03-22 | 한국조폐공사 | Method of manufacturing of magnetic particle for security ink and security ink using the same |
| KR101912099B1 (en) * | 2017-11-17 | 2018-10-26 | 한국조폐공사 | AlNiCo Based Magnetic Particle For Security Ink and security ink using the same |
| KR101912100B1 (en) * | 2017-11-17 | 2018-10-26 | 한국조폐공사 | Producing Method of AlNiCo Based Magnetic Particle For Security Ink |
| CN111357063A (en) * | 2017-11-17 | 2020-06-30 | 韩国铸造、安全印刷与Id卡操作公司 | ALNICO magnetic particles for anti-counterfeiting ink |
| KR101869484B1 (en) * | 2017-12-29 | 2018-06-20 | 한국조폐공사 | Light magnetic particle improved with durability and chemical resistance |
| CN109401442A (en) * | 2018-11-09 | 2019-03-01 | 广东彩乐智能包装科技有限公司 | A kind of silver-plated electrically conductive ink of UV curing nano and preparation method thereof |
| CN114266334A (en) * | 2021-12-21 | 2022-04-01 | 武汉华工图像技术开发有限公司 | Holographic anti-counterfeiting PC film, PC card and preparation method |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20210013869A (en) | 2021-02-08 |
| JP2022513058A (en) | 2022-02-07 |
| KR102218729B1 (en) | 2021-02-23 |
| WO2021020635A1 (en) | 2021-02-04 |
| US20220153055A1 (en) | 2022-05-19 |
| EP3886124A1 (en) | 2021-09-29 |
| EP3886124A4 (en) | 2022-08-24 |
| JP7312254B2 (en) | 2023-07-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR101718505B1 (en) | Method of manufacturing of magnetic particle for security ink and security ink using the same | |
| CN111357063B (en) | ALNICO magnetic particles for anti-counterfeiting ink | |
| JP5882793B2 (en) | Solvent-based ink comprising coated magnetic nanoparticles and process for preparing the same | |
| CN111566762B (en) | Light-colored magnetic particles having improved durability and chemical resistance | |
| JP5227733B2 (en) | Bismuth oxide additive for laser marking and method for producing the same | |
| TWI778084B (en) | Anti-counterfeit ink composition, anti-counterfeit ink, anti-counterfeit printed matter, and method for producing the anti-counterfeit ink composition | |
| KR101912100B1 (en) | Producing Method of AlNiCo Based Magnetic Particle For Security Ink | |
| CN112955983A (en) | Magnetic particles for forgery-preventing ink and forgery-preventing ink containing same | |
| KR102264490B1 (en) | Method of manufacturing magnetic particle with controlled particle size distribution and security ink using the same | |
| KR102217912B1 (en) | Alnico based hard magnetic particles and producing method thereof | |
| KR102559243B1 (en) | Security ink composition comprising AlNiCo based magnetic particle | |
| KR102289213B1 (en) | Magnetic particle for security ink and security ink comprising the same | |
| KR102559246B1 (en) | Security ink composition for screen process comprising AlNiCo based magnetic particle | |
| KR102401519B1 (en) | Light-color Magnetic Particle For Security and the Fabrication Method Thereof | |
| JP2023516408A (en) | Selective superparamagnetic sintering method and suitable ink | |
| JPH11172134A (en) | Production of organic pigment having good property capable of readily dispersing, light resistance and heat resistance |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |